/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/

#include <fstream>
#include "itkGrayscaleDilateImageFilter.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkTextOutput.h"
#include "itkSimpleFilterWatcher.h"
#include "itkFlatStructuringElement.h"

int itkGrayscaleDilateImageFilterTest(int ac, char* av[] )
{
  // Comment the following if you want to use the itk text output window
  itk::OutputWindow::SetInstance(itk::TextOutput::New());

  if(ac < 6)
    {
    std::cerr << "Usage: " << av[0] << " InputImage BASIC HISTO ANCHOR VHGW" << std::endl;
    return -1;
    }

  unsigned int const dim = 2;
  using ImageType = itk::Image<unsigned char, dim>;

  using ReaderType = itk::ImageFileReader<ImageType>;
  ReaderType::Pointer reader  = ReaderType::New();
  reader->SetFileName(av[1]);

  // Create a filter
  using SRType = itk::FlatStructuringElement<dim>;
  using FilterType = itk::GrayscaleDilateImageFilter< ImageType, ImageType, SRType >;
  FilterType::Pointer filter = FilterType::New();
  filter->SetInput( reader->GetOutput() );

  itk::SimpleFilterWatcher watcher(filter, "filter");

  using RadiusType = FilterType::RadiusType;

  // test default values
  RadiusType r1;
  r1.Fill( 1 );
  if ( filter->GetRadius() != r1 )
    {
    std::cerr << "Wrong default Radius: " << filter->GetRadius() << std::endl;
    return EXIT_FAILURE;
    }

  if ( filter->GetAlgorithm() != FilterType::HISTO )
    {
    std::cerr << "Wrong default algorithm." << std::endl;
    return EXIT_FAILURE;
    }

  try
    {
    filter->SetRadius( 4 );

    using WriterType = itk::ImageFileWriter< ImageType >;
    WriterType::Pointer writer = WriterType::New();
    writer->SetInput( filter->GetOutput() );

    filter->SetAlgorithm( FilterType::BASIC );
    writer->SetFileName( av[2] );
    writer->Update();

    filter->SetAlgorithm( FilterType::HISTO );
    writer->SetFileName( av[3] );
    writer->Update();

    filter->SetAlgorithm( FilterType::ANCHOR );
    writer->SetFileName( av[4] );
    writer->Update();

    filter->SetAlgorithm( FilterType::VHGW );
    writer->SetFileName( av[5] );
    writer->Update();
    }
  catch (itk::ExceptionObject& e)
    {
    std::cerr << "Exception detected: "  << e.GetDescription();
    return EXIT_FAILURE;
    }

  // Generate test image
  using WriterType = itk::ImageFileWriter<ImageType>;
  WriterType::Pointer writer = WriterType::New();
  writer->SetInput( filter->GetOutput() );
  writer->SetFileName( av[2] );
  writer->Update();

  return EXIT_SUCCESS;
}
